Insulator.



UNITED STATES PATENT OFFICE.

HENRY F. KRETZER, OF ST. LOUIS, MISSOURI.

INSULATOR.

SPECIFICATION forming part of Letters Patent No. 699,761, dated May 1 3, 1902.

Application filed January 27. 1902. erial No. 91,446. No model.)

T0 (1% whom it may concern.-

Be it known that I, HENRY F. KRETZER, a citizen of the United States, residing, at St. Louis, State of Missouri, have invented certain new and useful Improvements in Insulators, of which the following is a full, clear, and exact description, reference being had to the accompanyingdrawings, forming a part hereof.

My invention has relation to improvements in lightning-rod insulators; and it consists in the novel construction of insulator more fully set forth in the specification and pointed out in the claims.

In the drawings, Figure 1. is an elevation of a section of a dwelling, showing my invention applied thereto. Fig. 2 is an elevation of the insulator. Fig. 3 is an elevation at right angles to Fig. 2. Fig. 4 is a perspective view of the insulator, showing the lightningrod coupled thereto. Fig. 5 is a top plan of the insulator. Fig. 6 is a middle vertical section on line 6 6 of Fig. 3. Fig. 7 is an elevation of a modified form of the device, and Fig. 8 is a top plan thereof.

The object of my invention is to construct an insulator which will dispense with the usual basal ring by which the same is generally secured in place, one which may dispense with the presence of the usual perforations intended for the insertion of the wire by which the rod is fastened to the insulator, and one which in other respects presents a simpler and more desirable form better apparent from a detailed description of the invention, which is as follows:

Referring to the drawings, 1 represents the body of the insulator, being preferably cylindrical in form, as shown. Adjacent to the base thereof is an annular peripheral groove 2, having parallel communicating passages 3 3, disposed at points diametrically opposite one another and opening at the opposite end or top of the insulator.

Formed in the upper end or face of the body portion between the passages 3 and disposed at right angles to a line connecting said passages is a groove or depression 4 for the reception of the lightning-rod 5, the latter being subsequently fastened to the insulator by the twisted ends of the wires 6 6, whose medial portions are formed into a loop 7, passed over the insulator and made to snugly hug the base of the annular groove 2, the twisted strands of the wires being folded into the pas sages 3 3 and their ends finally twisted about the rod'5, as best seen' in Fig. 4. The body portion 1 is secured in position bya screw 8, inserted previously from the top into a central socket 9, communicating with the depression 4, the base of the socket communi-' catin g with a central axial passage 10, through which the screw is inserted.

I may provide the present insulator with alining perforations 11 11, located in the path of the passages 3, through which the securing-wire may be threaded and then folded and twisted over the rod 5, if desirable, though in practice I may dispense with the perforations 11 altogether and secure the rod in the manner indicated in Fig. 4.

here the lightning-rod is of small crosssectional area and does not completely fill the depression 4, then in order that the twisted ends of the securing-wires 6 6 may better bind such smaller rod I provide the upper end of the body portion with supplemental grooves 12 12, communicating with the passages 33, as seen in the modifications in Figs. 7 and 8. It is obvious from these that the wire ends will thus bind a smaller rod to better advantage. In other respects the forms shown in Figs. 7 and 8 are the same as in the other figures, and while I have shown the perforations ll 11 omitted therefrom they could also be present in said modified forms.

7 In the present invention the securing-screw is completely covered and protected,and little or no moisture can find access thereto to rust the same, and since, moreover, the perforations 11 can be omitted altogether it follows that the securing-wire may be carried on the outside of the body portion, which latter can thus be made of maximum strength and durability. I may of course alter the present construction in minor details without in any wise departing from the spirit or nature of my invention. Neither doI wish to be understood as limiting its application to lightning-rods.

Having described my invention, what I claim is- 1. An insulator comprising a body portion, a circumscribing groove located adjacent to one end thereof, parallel communicating passages leading from said groove along the periphery of the body portion, a depression formed in the face of the body portion for the reception of the electric conductor or rod, the groove being adapted to receive the loop of a suitable securing-wire, the ends of the latter being passed through the passages and folded over the rod, substantially as set forth.

2. An insulator comprising a body portion, an annular groove disposed adjacent to the base thereof, communicating passages leading from said groove at points diametrically opposite one another and opening at the face or top of the body portion, a depression formed in the face and disposed at right angles to a line connecting the passages aforesaid, a socket leading from the center of said depression, and a passage or perforation leading from the base of the socket for the reception of a securing-screw, substantially as set forth.

An insulator comprising a cylindrical body portion, an annular peripheral groove disposed adjacent to the base thereof, coinmunieating passages leading from the groove,

supplemental grooves formed in the face of the body portion leading from the passages aforesaid, a depression formed in the face and disposed at right angles to the supplemental grooves, a socket leading from the center of the depression, and a perforated passage leading from the socket for the reception of a securing-screw, substantially as set forth.

4. An insulator comprising a cylindrical body portion, an annular peripheral groove disposed adjacent to the base thereof, parallel diametrically separated passages leading from the groove and terminating at the face of the body portion, a depression disposed in the face of the bodyportion at right angles to the diametrio line connecting said passages, and alining perforations opening through the parallel passages, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY F. KREIZER.

\Vitnesses:

EMIL STAREK, G. L. BELFRY. 

